Keep OEM ECM or upgrade?

I currently have a 96 Electra Glide Classic FI and it is pretty much stock. I plan on upgrading the mufflers with Hooker Header Tuned Slip-ons but
not sure if I want to install a stage 1 kit. I was thinking about installing a Power Commander as well but only works on the 97 or newer models.
My question is, would it be beneficial for me to upgrade the ECM to a newer model? I understand the stock ECM is not adjustable.